You have to be comfy on camera but this is your first chance to say hello to mom and dad on camera.

在镜头前表现得自然点儿,因为这是你第一次在电视上跟爸妈打招呼。

哈佛公开课 - 计算机科学课程节选

and you say "hi" to everyone that you see on the street.

无论在街上遇到谁，你都可以跟他打招呼。

百慕大出身 - SpeakingMax英语口语达人

Her name is pronounced Cansu so she will appreciate your keeping that in mind when you say hello to her in person, Cansu being our head TF.

她的名字叫Cansu，她会很感谢你,因为你跟她打招呼的时候，记住了她的名字，顺便说一下，Cansu是我们的TF头。

哈佛公开课 - 计算机科学课程节选